View Compilation Error

0_0_2027945_20708.c:2:20: algorithm: No such file or directory
0_0_2027945_20708.c:4: error: syntax error before "namespace"
0_0_2027945_20708.c:7: error: syntax error before "used"
0_0_2027945_20708.c: In function `main':
0_0_2027945_20708.c:10: error: syntax error before '/' token
0_0_2027945_20708.c:12: error: syntax error before '/' token
0_0_2027945_20708.c:47: error: syntax error before '/' token